IMEI (International Mobile Equipment Identity): This is a unique numerical code composed of 15-17 digits that identifies a mobile device. IMEI is used to communicate with network providers and can be employed to block or track stolen devices.
IMSI (International Mobile Subscriber Identity): This is a unique subscriber identifier assigned to a SIM card. IMSI is used for authenticating the subscriber on mobile networks.
MAC Address (Media Access Control): This is a unique address assigned to a network adapter of the device. It is used for identifying the device in local networks and Wi-Fi connections.
Android ID: A unique identifier assigned to an Android device. It’s used by app developers to recognize the device on which their app is operating.
Advertising ID: This identifier is used to track user activity and show personalized advertisements. Users can reset or reinitialize this identifier to enhance privacy.
Serial Number: A unique number assigned by the manufacturer to the device. It can be used for identifying the device for servicing or warranty purposes.
UDID (Unique Device Identifier): This is an identifier for Apple devices. However, starting from 2020, Apple no longer supports the use of UDID due to privacy concerns.
IP (Internet Protocol): Is a system that assigns unique addresses to devices, allowing them to communicate and connect on the internet.
Of course, these are only a small part of the IDs that smartphones have, but they are the most interesting.
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